Method and apparatus for making metal containers



Jan. 1, 1935. J. F. WERDER 1,986,169

METHOD AND APPARATUS FOR MAKING METAL CONTAINERS Filed Jan. 10, 1931 INVENTOR ATTORNEK$ Patented Jan. 1:1935

METHOD AND APPARATUS- FOR MAKING METALCON'IJAINERS John F. Werder', Lakewood; Ohio, assignor of one-half to Edmund Rogers, South Euclid,

Ohio

Application was 10, 1f9s1,"seria1 No. 507,929

:0lainlsfi (01. 113-67) This invention relates to the" art of meta-loom tainers which are adapted to withstand s tial internal pressure. 1. Thecontainers contemplated by the ubstanpresent 5 invention may be employed for the storage, shipping, and dispensing of various fluids underpressure, either gas or liquid, and the'present application is especially concerned withiits use for a gas-charged liquid,- such as a lubricant 'for automobiles.

It is to be understood, however, that the method and apparatus herein disclosed may be employed for. the "construction of'metal containers to be applied to any purpose for which they are adapted. It is to berunderstoo'd also that the present form of disclosure is merely for purposes of illustration and that there maybe deivised various modifications without departing from the spirit of the presentinvention asher'ein described and claimed.

The purpose of filling such a container with a gas-charged lubricant or other liquid is'to'enable it to be discharged from the container by means of the pressure contained therein; This has proved especially advantageous inthe'usevof such a gas-charged lubricant upon-automobile In devising a container for fluid und stantial pressure, applicant has iound' it'most s. er subexpedient to give to the body andends oi the-com tainer as nearly a's-possible a form which it would naturally take when subjected to such pressure. The tendency of such pressure, radially and equally in all directions, istowards a spherical The present inventiontheree form of container;

fore contemplates giving to the container so far as practical in a cylindrical container now under consideration, a form determined ,bythe degree of pressure which the containerfis ed to withstand. The applicationof air pressure intendto the inside of the containerflfo-r this purpose is known as the blowing process.

The degree of pressure applied to the inside of such icontainer may vary according to conditions as for instance by the length of time the container issubiected to such pressure and also the gauge of the metal of the'container body. I In the} comparatively small size of container which iorme'd'of light sheet metal, as 'for instance, tin plate with which the present invention is primarily concerned, it has been'found that '75 pounds air pressure-is sufficient for practical purposes, although such a container has been successfully charged tothe point 0 5200 pounds. many event, thepressure applied during the "blowing process is erably greater than that to which the co is to be subjected by itseonte'nts.

considntainer Heretofore, in themanufactureof containers intended towithstand internal pressure, it has been the p ractice to first give the parts of the intended.

Obviously, after the parts of the container have all been soldered together, it is altogether impossible to inject flux or solder through these soldered joints for the purpose of re-solder+ ing thersame upon the inside of the container to correct any fault or failure thereof during the blowing process. Applicant however has devised a more expedient method of first applying and soldering the heads in plain form to the cylindrical body which has already been connected along its longitudinal joint but without solder being applied thereto, assuming that the old form of side seam be employed. In such form, according to the present improved method, the container is subjected to internal pressure so as to blow the heads of the container t o the extent desired and to generally give proper curvature to the cylindrical body as well. This method of procedure is made possible by the applicants discovery and invention of a method of then re-soldering the inside of the head joints so as to overcome any weakness due to the strai sired, the already Sol 11 of the blowing process. If so delongitudinal joint. may have been dered by the application of flux and solder thereto from the outside. This therefore constitutes the object of the present invention which includes both the method and apparatus Fig. 1 illustrates side of the container i applied to t jointsi The means for introducing the fiux and also solder for carrying out the procedure referred to.

possibly to the inside of the container involves a small opening through the center of one of the heads of the container, through. which the flux and solder manner an may be introduced in any suitable dfrom any suitable form of container.

The same process can then be repeated for the head joint at the other end. I

The manner of construction and arrangement of the soldering rollers is indicated in- Fig. 3 in which the larger rollers 4 and the smaller rollers 5 when arranged in such manner will .permit the container 6 to assume inclined position. Rollers 4 and 5 are mounted upon the same shaft in each case.

from the bath 7 into which the rollers 5 extend. The shoes 8 are provided at their upper corners with cut-out portions which are curved at their bottoms and are spaced slightly from the rollers 5 so as to permit a film of solder to be carried by the rollers 5 from the bath '7 but without permitting the undesirableoxidized surface portion of the solder from being carried upwardly by the rollers 5. In this way, there is insured the application of only clean and efiicient solder to the joints. r i

As a meansof insuring an efiicient wiping action by the rollers 5 upon the joint of the container during the re-soldering operation, I'have devised the method of operatingthe two rollers 5 at somewhat difierent speeds, these rollers in the present case being of the same size. There will thereby be caused a movement. of the container about its axis as it restsupon the rollers 5 and there will be produced an efficient soldering operation about the entire head joint as the container is rolled about. V

Instead of having rollers 5 of the same diameter operated at different speeds, there may be substituted rollers of difierent diameters rotated at the same speed. The gist of the invention is that there maybe a difference in the linear or surface speed of the two rollers 5 so as to produce the wiping action.

In the present form of illustration, the belt.9 is driven from the sprocket 10 on the drive shaft 11 and has drive connection with the sprocket 12 on the shaft 13. 'The same shaft-l3 through the sprocket l4 and the chain 15 drives the shaft 16 upon which one of the rollers 5 is mounted. As will be seen from Fig. 2, as a result. of the drive connections therein indicated, the rollers 5 will be driven at different speeds but in the same direction. It is to be understood that any other suitable form of mechanismas for instance gear connections, may be adopted for the same purpose and that the ratio between the speeds of, the rollers 5 may also be varied. As above stated, upon completion of the soldering operation for the joint at the one end of the container, the position of the container upon the rollers 4 and 5 may be reversed'so as to permit the same re-soldering operation for the other end head. 7

The small aperture in the one head of the container which has been employed for the introduction of flux and solder to the inside of the container, may be utilized for the installation of a valve connection to be employed forthegfilling of the container with the gas-charged lubricant and later for the discharge of the same therefrom.

Thus, I have devised a comparativelysimple The rollers 5 will be heated in any suitable manner and will be supplied with solder sure as Well as to lose the contents of the container. This invention also makes possible the construction of a container in the particular manner, as above outlined, which was apparently deemed impossible heretofore and which permits blowing the walls of the container to a form approaching as nearly as practical that corresponding to the force exerted by the internal pressure. Thus there is produced a more reliable form of containerv for the purposes intended.

What I claim is:

l. The method of making a metal container adapted to withstand substantial internal pressure, consisting in soldering together the body and heads of a metal container, subjecting the interior thereof to a pressure corresponding approximately to the aforesaid internal pressure, and then re-solding the joints between the body andheads of the container from the inside and outside thereof simultaneously.

2. The method of making a metal container adapted towithstand substantial internal pressure, consisting in soldering together the body and heads of a metal container, subjecting the interior thereof 'to a pressure corresponding approximately to the aforesaid internal pressure, and then re-soldering the joints between the body and heads of the container by the introduction of soldering material to the'inside thereof and the application of soldering material to the outside thereof while the container is in inclined position.

.3. The method of making a metal container adapted to withstand substantial internal pressure,..consisting in soldering together the body and heads of a metalcontainer, subjecting the interior thereof to a pressure corresponding approximatelyto the aforesaid internal pressure, and thenre-soldering in succession the joints between thebody and heads of the container by the introduction of successive charges of soldering material to the inside thereof through an opening in oneof. the heads thereof and the application of heat to the restricted area of the joint being re-soldered.

4. The method of making a metal container adapted to withstand substantial internal pressure, consisting in soldering together the body and'heads of a metal container, subjecting the interior thereof to a pressure corresponding approximately to the aforesaid internal pressure, and then re-soldering in succession the joints between the body and heads of the container by the introduction of successive charges of soldering material to the inside thereof and by then applying heat to the restricted area of each joint duringrotation of the container body in an inclined position about its longitudinal axis.

5. 'In a device of the class described, the combination of pairs of rotatable heated rollers so arranged as to afiord support for a cylindrical container, the rollers of one pair being of smaller diameter than those of the other pair so as to cause the container to assume a tilted position for properly locating the soldering material therewithin at the head joint of the container, and means for rotating said rollers.

, 6. The method of making a metal container, including the soldering of the joints between the body and heads of the container from the inside and outside thereof simultaneously.

7. The method of making a metal container, including the soldering of the joints between the body and heads of the container, by the application of soldering material to the inside of the joint and the application of soldering material to the outside of the joint simultaneously while the container is in inclined position.

8. In a device of the class described, the combination of means including rotatable heated rollers of different diameters arranged on the same axis at the two ends of the container for locating soldering material within the container at the proper point within the same and for resoldering the same, and means for operating said rollers.

9. In a device of the class described, the combination of means including rotatable rollers for tilting the container so as to locate soldering material within the container at the proper end joint on the inside thereof and for applying soldering material simultaneously to the outside thereof so as to solder the same while in such tilted position, and means for applying solder to the soldering rollers.

10. In a device of the class described, the combination of rotatableheated roller means of different diameters arranged on the same axis and adapted vto engage the ends of the container for tilting the same so as to locate soldering material within the container at the proper end joint and for soldering the same while in such tilting position, and means for operating the rollers.

JOHN F. WERDER.

CERTEFICATE OF CORRECTION.

Patent No. 1,986,169. January 1, 1935.

JOHN F. WERDER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, second colemn, line 23, claim 1, for "re-solding" read re-soldering; and page 3, second column, line 7, claim 9, for "applying" read supplying; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 26th day oi February, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents. 

